CVE-2006-3086

CVE-2006-3086 is a critical-severity vulnerability in Microsoft Hyperlink Object Library with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 56% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Description

Stack-based buffer overflow in the HrShellOpenWithMonikerDisplayName function in Microsoft Hyperlink Object Library (hlink.dll) allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long hyperlink, as demonstrated using an Excel worksheet with a long link in Unicode, aka "Hyperlink COM Object Buffer Overflow Vulnerability." NOTE: this is a different issue than CVE-2006-3059.

Frequently asked questions

What is CVE-2006-3086?
Stack-based buffer overflow in the HrShellOpenWithMonikerDisplayName function in Microsoft Hyperlink Object Library (hlink.dll) allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long hyperlink, as demonstrated using an Excel worksheet with a long link in Unicode, aka "Hyperlink COM Object Buffer Overflow Vulnerability." NOTE: this is a different issue than CVE-2006-3059.
How severe is CVE-2006-3086?
CVE-2006-3086 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2006-3086 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 56% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3086?
CVE-2006-3086 affects Microsoft Hyperlink Object Library. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-3086?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2006-3086 published?
CVE-2006-3086 was published on 2006-06-19 and last updated on 2026-06-16.

References

Affected products (1)

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